के.

24.

26.

27.

28.

29.

30.

In arc welding process an increase in the arc length

() Increases the voltage, causing fall in the current and thereby decreasing melting
rate :

(b) Decreasing the V, causing tall in I and thereby decreasing melting rate
(¢) Increases the V, causing an increase in I and melting rate
(१) Decreases the V, causing an increase in I and melting rate
A domestic refrigerator is loaded with food and the door closed. During a certain period the

machine consumes 1 kWhr of energy and the internal energy of the system drops by 5000 kd.
Find the net heat transfer of the system

ഭു 86144 യ -86104
(9. 512 d) -5MJ

The operation of enlarging a hole is called

(8) drilling (b) reaming
) boring (प) counter sinking

In a fuel cell electricity is produced by

(a) Combustion of fuel (0) Oxidation of fuel
(¢) Thermionic action (प) All of the above

In transonic regime Mach number is between
(a) 08-12 ‏(ط)‎ 0.8 -8
© 12-5 (ಕು 02-1
If the arrival takes place every 10 minutes with a service time of 4 minutes per unit, then the

mean arrival rate, mean service rate and the probability one would have to wait will be
respectively

(a) 10.4 0.25 യ 0.1, 0.25, 0.1

© 0.1, 0.25, 0.4 (@ 10, 0.4 0.28
0il flows through a 200 mm diameter horizontal cast iron pipe, friction factor f=0.0225 at a
rate of flow 0.2 m%s. What is the length of the pipe if head loss due to friction is 118.16 m of
the oil? g=9.81m/s*?

(8) 500௩ (b) 1000 ण

(0) 250 (प) 2003

5 78/2015
[P.T.0.]